You can opt to sync contacts, calendars, browser bookmarks, notes, and e-mail accounts with your new iPhone on this screen. This will sync the information that is currently stored on your desktop. If you want to access a different e-mail account or contacts with the iPhone, you can set that up later on the phone.
Once you've decided which information you'd like to sync to your new iPhone, press the "sync" button in the lower right corner of the iTunes window. You'll see a notification on your iPhone's screen that the sync is in progress; do not disconnect the phone from your computer while this is running.
Here at iOS Universe, we want to appeal to everyone, with all knowledge and experience levels regarding iOS and iOS devices. This includes those who have just gotten their very first iPhone, and are wanting to learn how to use it. Familiarizing yourself with your new iPhone, or any new device for that matter, can be a daunting process. And we want to make it easier for you.